oaibackup script error and issues

We're running the oaibackup script to see the output. We run it with the following:

/webs/documentlibrary/oaibackup/bin/oaibackup --m=dl --doclib -o /webs/dl-backup-test -u XXXX -p XXXX -f 2009-09-20 http://URL/oaipmh_private

This produces the following:

Traceback (most recent call last):
  File "/webs/documentlibrary/oaibackup/bin/oaibackup", line 15, in ?
    oaibackup.main.main()
  File "/webs/documentlibrary/oaibackup/src/oaibackup/main.py", line 84, in main
    from_dt, options.incremental, credentials, hooks)
  File "/webs/documentlibrary/oaibackup/src/oaibackup/backup.py", line 54, in backup
    dt = _harvest(c, output_dir, prefix, from_dt, hooks)
  File "/webs/documentlibrary/oaibackup/src/oaibackup/backup.py", line 91, in _harvest
    hook(output_dir, identifier, m)
  File "/webs/documentlibrary/oaibackup/src/oaibackup/documentlibrary.py", line 26, in documentlibrary_filesave_hook
    f = urllib2.urlopen(url)
  File "/webs/documentlibrary/lib/python2.4/urllib2.py", line 130, in urlopen
    return _opener.open(url, data)
  File "/webs/documentlibrary/lib/python2.4/urllib2.py", line 364, in open
    response = meth(req, response)
  File "/webs/documentlibrary/lib/python2.4/urllib2.py", line 471, in http_response
    response = self.parent.error(
  File "/webs/documentlibrary/lib/python2.4/urllib2.py", line 402, in error
    return self._call_chain(*args)
  File "/webs/documentlibrary/lib/python2.4/urllib2.py", line 337, in _call_chain
    result = func(*args)
  File "/webs/documentlibrary/lib/python2.4/urllib2.py", line 480, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 401: Unauthorized

There's an 'Unauthorized' error at the very end, but we do get a collection of files accompanied by corresponding .dl ascii text files (which contain 'xmlns' statements). These .dl files are the metadata for each document included in the backup, but it is missing the 'category' information! e.g. where a document resides within the library (e.g. Human Resources/Staff Site/policies). This is vital info!

So, in summary:

(1) Why do we get an Unauthorized error? This might have interrupted the backup. We have no way to tell if the backup complete dor not.

(2) Why is the category info missing from the .dl files that contain the metadata?